Carbon roll



March l0, 1959 L. K. FLEISCHMANN CARBON ROLL 2 Sheets-sheet 1 Filed Nov.25. 1954 March 10, 1959 l.. KQFLEISCHMANN 2,876,885

CARBON ROLL Filed Nbv.

2 Sheets-Sheet 2 United St-afee Pefef "Office 'CARBON ROLL Lester K.Fleischmann, Chicago, Ill.

Application November 23, 1954, Serial No. 470,682

6 Claims. (Cl. 197-126) This invention relates to carbon rolls of thetype adapted to be positioned on carbon holder mounting plates for usebetween adjacent strips of continuous-form stationery in a writingmachine.

A number of carbon rolls have heretofore each been loosely supportedupon a carbon holder between adjacent strips of continuous-formstationery with an unwound portion extending forwardly from each rollarou nd the platen of a writing machine in registry with the stationery.The carbon holder is generally mounted for longitudinal movement upon aforms carrying device which in turn is secured to the rear of a writingmachine4 so that the forms carrying device can move laterally with thecarriage of the writing machine during a typing operation. The inftermittent lateral movement of the forms carrying device has oftencaused the loosely supported carbon rolls to shift laterally out ofalignment. Thus, when the unwound portions of the carbon being used aremoved rearwardly for use between the next following form lengths ofstationery, the carbons slide laterally out of alignment in followingthe misaligned carbon rolls. The typist must then realign the carbonsbefore beginning the next typing operation. The present carbon rollstructure eliminates this problem of lateral sliding in a carbon roll. 4

The primary object of the present invention is to provide a new andimproved type of carbon roll and core.

Another object is to` provide a hollow core of predetermined uniformwidth for a carbon roll so as to make a snug t at its. opposite edgeswith a mounting plate of a carbon holder.

A further object is to provide a carbon roll having a hollow core ofuniform width, the core having a pair of oppositely disposed,transversely extending lines of weakening to determine precisely the twolines of fold in its lateral surface.

Still another object is to provide a new and improved method of forminga hollow core of predetermined uniform width for a carbon roll.

The invention s illustrated in the preferred embodiment in theaccompanying drawings, in which:

Fig. l is a broken perspective view showing the hollow core and aportion of the carbon strip;

Fig. 2, a sectional View taken as indicated on line 2-2 of Fig. 1;

Fig. 3, a sectional view taken as indicated on line 3-3 of Fig. 4;

Fig. 4, a plan view of the paper sheet from which the hollow core isformed;

Fig. 5, a broken pl-an view partly in section showing the carbon roll inposition upon a mounting plate of a carbon roll;

Fig. 6, a sectional view taken as indicated on line 6-6 of Fig. and

Fig. 7, a sectional view taken as indicated on line 7-7 of Fig. 5.

In the embodiment illustrated, the carbon roll includes g a hollow,generally flat core member, generally desigand 11, the edges beingsubstantially parallel to form a core of uniform width. Since it isdesired that each of the lateral edges makes a snug tit with a mountingplate 12 of the type shown in Figs. 5 and 6, the width of theV core ismade to conform to the particular mounting plate to be used.

As best seen in Fig. 4, the core 8 may be formed from a paper sheet,generally designated 13, of relatively durable material which isprovided with a pair of parallel, transverse lines of weakening 14 and15, respectively. The lines of weakening divide the sheet'13 into a pairof substantially congruent sheet sections 16 and 17, re? spectively, anda third sheet section 18 at the end of the sheet 13. It is clear thatperforated lines, score lines or any: other means for predetermining theposition of fold in the sheet along a definite line could be used. Thelocation of the lines of weakening 14 and 15 determine the width of thesheet sections 16 and 17 and the ultimate width of the core member 8, ascan be seen in Fig. 2. The third sheet section 18 may also be providedwith a line of weakening 19 defining one side ofv an end ap 20 havingone of its faces covered with a pressure sensitive adhesive 21. t

informing the core 8, the sheet sections 16 and 18 at lopposite ends ofthe sheet 13 are folded inwardly on linesv of weakening 14 and 15 (sheetsection 18I preferably on top) and secured together byadhesive 22. Theresulting flat hollow core has an upper and a lower lateral surface, 8aandSb, respectively, of identical configuration so that the core has auniform width. The lines of weakening 14 and 15, of course, occupy thefold lines at the closed, opposite edges of the core. Preferably theflap 20 at the free end of the sheet section 18 is left unsecured sothat it may be folded back upon line of weakening 19.

To attach the carbon strip 9, an end of the strip isinserted beneath Hap20, carbon side down, so that the back of the carbon strip 9 can besecured to the ap 20 by the adhesive 21. The desired length of carboncan then be wound upon the core 8. By attaching the extreme tipof'the'carbon strip 9 to the core 8, `very little of the car# bon iswasted. In addition, the carbon holder on which the carbon roll ismounted does not need any separate means for securing the carbon stripto the holder during a typing operation.

Since the core 8 is exible, it may be placed upon a mandrel for thewinding operation. Mandrels having variously shaped cross sections havebeen used. Some are circular; others are oblate or rectangular.Generally when the carbon roll is removed from the mandrel after i willoccupy less vertical space wh'enplaced between adjacent strips ofcontinuous-form stationery.

A tab member 23 may be secured to an inner face of the hollow core, asby adhesive 24. It may be placed upon the sheet during the formation ofthe core 8, or it may be inserted into the hollow core after the core isformed. The tab member 23 is positioned so that an end portion extendsoutwardly of an end of the core 8. One face of this end portion isgenerally provided with APairneri Mar, 10,1959,

assess@ a spot of pressure sensitive adhesive 25 which is normallylcovered by the protective paper sheet 26 until it is desired to use thecarbon roll. i

'Io place the carbon roll upon the mounting plate 1 2, an open end ofthe core is located by grasping the tab member 23 which is secured tothe interiorr of the hollow core. The hollow core 8 is then pulled overthe mounting plate 12 to the desired position, as shown by either of thescales 27 on the mounting plate (Fig. 5). The protective paper 26 isthen removed from the tab member 2 3 to permit the tab to be secured tothe mounting plate by the adhesive 25. Generally the mounting plate isrotatable so that as much carbon as is desired can be unwound from thecarbon roll.

The present carbon roll also makes it very easy to change carbons. Whenall of the carbon is unwound from the core, the tab member 23 is merelyloosened from the mounting plate 12, and the core S is removed. Sincethe end of the carbon is attached to the core, the carbon strip 9 neednot be touched by the typist.

Since the lateral edges 10 and 11 make a snug t with the edges of themounting plate 12, there is no tendency f or the carbon roll to skewduring a typing operation. In addition, the tab member 23, attached tothe mounting plate by adhesive 25, also prevents the carbon roll fromsliding laterally outwardly from between adjacent strips ofcontinuous-form stationery, and correct align ment of stationery andcarbon is assured at all times.

The foregoing detailed description is given for clearness ofunderstanding only, and no unnecessary limita tions should be understoodtherefrom, for some modif ications will be obvious to those skilled inthe art.

I claim:

l. A carbon roll adapted for use upon a mounting Plate of a carbonholder between adjacent strips of continuous-form stationery,comprising: a hollow paper core open at its opposite ends and having aline weakening in each of its oppositely disposed, closed, lateraledges, said lines of weakeningbeing spaced apart to provide a core ofpredeterminedwidth when folded on said lines so as to make a snug fit atits lateral edges with the mounting plate; and an elongated strip ofcarbon paper wound around said core, said strip being secured at one endto said core to retain the wound strip in lateral alignment.

2 A carbon roll adapted for use between adjacent strips ofcontinuous-form stationery, comprising: a paper sheet having its endportions turned upon each other into ,4 overlapping relationship andsecured together to form a' hollow core open at its opposite ends, thelateral surface of said core having a pair of parallel, transverse,oppositely disposed lines of weakening on which said lateral surface maybe folded to form a pair of opposed core portions of the same width; andan elongated strip of carbon paper wound aroundvsaid core, said stripbeing secured at one end to said core to retain the wound strip inlateral alignment.

3. A carbon roll as specified in claim 2, in which the end portions aresecured together so as to provide on the outerlateral surface of thecore an exposed unsecured free end of one of said end portions to whichthe strip of carbon is secured.

4. A carbon roll as specified in claim 2, in which a tab member issecured to an inner face of the hollow core, said tab member extendingoutwardly of one of the open ends of said hollow core and being providedwith a pressure sensitive adhesive to aid in maintaining the carbon rollin proper position upon a mounting plate of a carbon holder.

5. A carbon roll assembly adapted for use in a carbon holder betweenadjacent strips of continuous form stationery, comprising: a hollowpaper core open at its opposite ends and having a line of weakening ineach of its oppositely disposed closed lateral edges, said lines ofweakening being spaced apart to provide a core of predetermined widthwhen folded on said lines; an elongated strip of carbon paper secured atone end to the core and wound thereupon to form a carbon roll; and acore mounting member positioned within said hollow core, said mountingmember having opposite edge portions making a snug tit with said linesof weakening in the lateral edges of the core to restrict lateralmovement of the core upon the mounting member during a typing operation.

6. A carbon roll assembly as specied in claim 5, in which a laterallyextending indexing scale is provided on the mounting member so that afresh carbon roll can be properly positioned on said mounting memberwhen a used carbon roll is replaced.

References Cited in the file of this patent UNITED STATES PATENTS877,755 Church Jan. 28, 1908 2,236,155 Petit Mar. 25, 1941 2,730,225Fleischmann Jan. l0, 1956

